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对TM波照射下喷气发动机进气道的极化散射矩阵进行了分析计算。通过将喷气发动机进气道等效成规则的圆波导腔结构 ,用多个波导模的叠加表示进气道内电磁场 ,并采用平面孔径辐射场的克希荷夫积分公式和电磁场互易定理 ,求得了进气道的极化散射矩阵 ,从而将复杂的腔体散射问题简化到只需求在规则波导模激励下喷气发动机终端的反射系数。所得结论对单、双站散射均适用。
The polarization scattering matrix of jet engine inlet was analyzed and calculated under TM wave irradiation. By equating the inlet of a jet engine into a regular circular waveguide cavity structure, the electromagnetic field in the inlet is represented by the superposition of a plurality of waveguide modes. The Kirchhoff integral formula of the planar aperture radiation field and the reciprocity theorem of the electromagnetic field are used to calculate The polarization scattering matrix of the inlet is obtained, which simplifies the problem of complex cavity scattering to only the reflection coefficient of the jet engine terminal under the regular waveguide mode excitation. The conclusion is valid for single and double station scattering.